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Osmotic Pressure and Osmotic Potential

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Question

Calculate the osmotic pressure of 5% of urea solution (Molar mass of urea = 60g/mol) at 27^oC. (r=0.0831)

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Solution

$O s m o t i c p r e s s u r e π = C R T = \frac{n_{2}}{V} R T = \frac{W_{2} / M_{2}}{V o l o f t h e s o l u t i o n i n L} \times R T = \frac{5 / 60}{0.1} \times 0.0831 \times 300 (\sin c e t h e c o n c e n t r a t i o n o f t h e s o l u t i o n = 5 % = 5 g i n 100 m l) = 20.775 a t m$

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